William birks



(N0 Modeli- 2 Sheets-Sheet 1.

W. BIRKS.

GARVING MACHINE.

No. 605,773. Patented June 14,1898.

' (No Model.) 2 Sheets-Sheet 2.

W. BIRKS.

GARVING MACHINE.

No. 605,773. I Patented June 14,1898.

UNITED STATES PATENT GFFILCE.

WILLIAM BIRKs, OF NOTTINGHAM, ENGLAND.

CARVlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 605,773, dated June 14, 1898.

Application filed $eptem'ber 2'7, 1897. Serial No. 653,194:- (No model.) Patented in England November 5, 1894, No. 21,166, and in France February 7,1896, No. 253,768.

To aZZ whom it may concern.-

Be it known that I, WILLIAM BIRKS, a subject of the Queen of Great Britain, residing at Nottingham, in the county of Nottingham, England, have invented certain new and useful Improvements in Machines for Outtin g or Carving Wood, (for which I have obtained Letters Patent of Great Britain, No. 21,166, dated November 5, 1894, and France, No. 253,768, dated February 7, 1896,) of which the following is a specification.

The object; of this invention is the construction of a machine upon which one or more pieces of wood may be cut to a desired shape or be ornamented by carving from a pattern or design drawn upon paper instead of from a model.

In the accompanying drawings, Figure 1 is a front elevation of part of the machine. Fig. 2 is a section on the line A A, Fig. 1, to an enlarged scale. Fig. 3 is an elevation, to an enlarged scale, showing the means for carrying the cutters and cutter-bar. Fig. --:l is a section on the line B B, Fig. 3. Fig. 5 is a section on the line C 0, Fig. 3. Fig. 6 is an elevation of a bladed cutter, and Fig. 7 is a plan of the same.

In the machine used for carrying out this invention the wood to be out or carved is attached to bars g, which form part of a frame g, which is fitted to move in any direction in the same plane. To the lower part of the frame there are attached brackets 9 carrying rollers 9 which run upon a bar g and this latter is attached at each end of the machine to guides'which slide on rods 9 fixed to the end standards a. The weight of the frame 9' is balanced by weights 9 connected thereto by bands g, which pass over pulleys on a shaft 9 The upper part of the frame g is guided at both ends by rollers g suit ably supported and fitted to rotate between other rollers g on the top bar of the frame.

For actuating the frame it is connected to a pantograph arrangement of levers and links h, of which the upper member is pivoted at h to an adjustably-fixed bracket carried by other brackets from the top tie-rails b. On the frame 9 is a bracket 9 in which a rack g is fitted to slide and at its upper end is connected at g to the paniograph, this arrangement being introduced to facilitate the vertical adjustment of the work with regard to the cutters.

The cutters are fixed to spindles e, which are carried by brackets e and rotated from the shaft (1 through pulleys d e and a cord or band. The cutter-brackets e are adjustably fixed to a rail e, which is fitted to slide to and from the frame .g on rails f which are carried by brackets f from the tie-rail c. This arrangement enables the horizontal position of the cutters to be adjusted according to the thickness of the material being operated upon or the depth of the cutting. For altering the position of the rail c it is connected by links f to levers f on a shaft f, which extends across the frame and is fitted with a handle f which can be moved in front of and fastened to a fixed quadrant f at the end of the machine.

The cutter is varied in shape and size according to the character of the work required. It may be pointed, square, round, or other shape at the end and it has cutting edges similar to a rose-bit. When the machine is used for outline work, such as letters for signs, the cutter may be constructed as shown in Figs. 6 and 7. This cutter consists of a spindle k to which the blades are attached, such blades being straight or twisted and may be shaped and arranged to out a square, inclined, curved, or other shaped edge.

The drawing or design is placed upon the pantograph-board 71 in a convenient position relatively to the pointer h The wood is fixed in the frame g and motion given to the shaft 01. This drives the cutters, which are moved forward by the handle f until the desired depth of cut is obtained. The pointer h is then moved by the attendant over the lines of the pattern or design, which is reproduced by the cutters on the wood carried by the frame, the size of the reproduction depending upon the proportion of the pantograph.

. What I claim, and desire to secure by Letters Patent in the United States, is-

1. The combination of a wood carrying frame, rollers attached thereto, a bar for the rollers to run on, guides for the bar, balanceweights attached to the bar by flexible bands, pulleys for the bands to run over, roller-guides for the upper part of the frame a pantograph arrangement of levers and rotating cutters substantially as described.

2. The combination of a wood-carrying frame, rollers, roller-bar, guides and balance- Weights for the frame, a pantograph arrangement of levers a rack and slide between the frame and pantograph, rotating cutters, a cutter-spindle frame adjustable longitudinally on a bed fitted to slide transversely on fixed pins lever for adjusting the relative positions of the bed and frame and a shaft for driving the cutters substantially as described.

3. The combination of a wood-carrying frame fitted to move in any direction in the same plane, rollers attached thereto, a bar for the rollers to run on guides which permit the bar to move vertically, Weights for balancing the frame and attached to the bar supporting it by flexible bands which pass over pulleys on a shaft, roller-guides for the upper part of the frame, a pantograph for moving the frame,a slide-and-rack connection, rotating cutters carried by a spindle which runs in brackets longitudinally adjustable on a bed transversely adjustable relatively to the frame, levers for moving the bed, means for holding the bed, and a cutter-spindle-driving shaft substantially as described.

\VILLIAM BIRKS. \Vitnesses:

ALFRED CULLEN, F. WALKER. 

